Quantitative measurement of high intensity focused ultrasound pressure field by optical Phase Contrast method applying non-continuous phase unwrapping algorithm

Mohd Syahid, Seiji Oyama, Jun Yasuda, Shin Yoshizawa, Shin Ichiro Umemura

研究成果: Article査読

11 被引用数 (Scopus)

抄録

A fast and accurate ultrasound pressure field measurement is necessary for the progress of ultrasound application in medicine. In general, a hydrophone is used to measure the ultrasound field, which takes a long measurement time and might disturb the ultrasound field. Hence, we proposed a new method categorized in an optical method called Phase Contrast method to overcome the drawback in the hydrophone method. The proposed method makes use of the spatial DC spectrum formed in the focal plane to measure the modulated optical phase induced by ultrasound propagation in water. In this study, we take into account the decreased intensity of the DC spectrum at high ultrasound intensity to increase the measurement accuracy of the modulated optical phase. Then, we apply a non-continuous phase unwrapping algorithm to unwrap the modulated optical phase at high ultrasound intensity. From, the unwrapped result, we evaluate the quantitativeness of the proposed method.

本文言語English
論文番号07HC09
ジャーナルJapanese journal of applied physics
54
7
DOI
出版ステータスPublished - 2015 7 1

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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